Lexus NX: Pointer Displayed/not Displayed Repeatedly

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • When replacing the radio receiver assembly, always replace it with a new one.

    If a radio receiver assembly which was installed to another vehicle is used, the following may occur:

    • A communication malfunction DTC may be stored.
    • The radio receiver assembly may not operate normally.

HINT:

Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Audio and Visual System.

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PROCEDURE

1.

CONFIRM SYMPTOMS

(a) Recheck the situation when the malfunction occurs.

HINT:

  • When a hand is rested on the remote touch screen while driving, the remote touch may react to finger movements and repeatedly display and hide the pointer.
  • When accelerating excessively on rough roads, the remote touch may react to the acceleration and repeatedly display and hide the pointer.

Result

Proceed to

Symptom occurs in any situation.

A

Symptom occurs when hand is rested on the remote touch screen while driving.

B

Symptom occurs when accelerating excessively on rough roads.

C

B

END

C

GO TO STEP 4

A

2.

CHECK FOR FOREIGN MATTER

(a) Check if there is any foreign matter around the remote touch screen that interferes with operation of the screen.

OK:

There is no foreign matter around the remote touch screen that interferes with operation of the screen.

NG

REMOVE FOREIGN MATTER (CHECK OPERATION AGAIN)

OK

3.

REMOTE TOUCH SELF CHECK (CHECK TOUCH SCREEN OPERATION POSITION RECOGNITION CONDITION)

(a) Enter self-diagnostic mode.

Click here

(b) Operate the remote touch screen diagonally from the upper left to the lower right and check that the brightness of the switch illumination changes.

NOTICE:

Since the remote touch screen may recognize a pinch in/out operation if operated with 2 fingers, always use 1 finger to operate the remote touch in self-diagnostic mode.

OK:

Brightness changes according to touch screen operation.

Result

Proceed to

Brightness of the switch illumination changes according to remote touch screen operation.

A

Brightness of the switch illumination does not change according to remote touch screen operation.

B

Switch illumination continues to blink.

HINT:

When the switch illumination blinks, the remote touch has stored a DTC.

*a

Switch Illumination

*b

Touch Screen

A

REPLACE RADIO RECEIVER ASSEMBLY

B

REPLACE REMOTE OPERATION CONTROLLER ASSEMBLY (REMOTE TOUCH)

4.

CHECK CONNECTOR CONNECTION CONDITION

(a) Check if the I71 remote operation controller assembly (remote touch) connector is securely connected.

OK:

The connector is securely connected.

NG

SECURELY CONNECTED

OK

5.

CHECK HARNESS AND CONNECTOR (REMOTE OPERATION CONTROLLER ASSEMBLY [REMOTE TOUCH] - BATTERY AND BODY GROUND)

(a) Disconnect the remote operation controller assembly (remote touch) connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

I71-10 (GND) - Body ground

Always

Below 1 Ω

*a

Front view of wire harness connector

(to Remote Operation Controller Assembly [Remote Touch])

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

I71-1 (+B) - Body ground

Power switch off

11 to 14 V

I71-6 (ACC) - Body ground

Power switch on (ACC)

11 to 14 V

OK

REPLACE REMOTE OPERATION CONTROLLER ASSEMBLY (REMOTE TOUCH)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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